Set up a separate SNS topic for each partner. Modify the Lambda function to publish messages for each partner to the partner's SNS topic

Set up a separate SNS topic for each partner and subscribe each partner to the respective SNS topic. Modify the Lambda function to publish messages with specific attributes to the partner's SNS topic and apply the appropriate filter policy to the topic subscriptions

Set up a separate Lambda function for each partner. Set up an SNS topic and subscribe each partner to the SNS topic. Modify each partner's Lambda function to publish messages with specific attributes to the SNS topic and apply the appropriate filter policy to the topic subscriptions

Set up an SNS topic and subscribe each partner to the SNS topic. Modify the Lambda function to publish messages with specific attributes to the SNS topic and apply the appropriate filter policy to the topic subscriptions